I can’t really say a difference between ceramic and porcelain simply because I don’t own porcelain. Although I have noticed a difference in most other types, such as plastic, cardboard, and styrofoam…basically anything you are served for tea on the go from coffee/tea places.

I also noticed a strange taste when I first used my stainless steel travel mug. I don’t know if stainless steel can absorb flavors like a yixing teapot can, but there is a nice patina on the inside that prevents my tea from tasting metallic.